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  <title>给出文件的信息</title>
 </head>
 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.stat" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">stat</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">stat</span> &mdash; <span class="dc-title">给出文件的信息</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.stat-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>stat</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
   ) : <span class="type">array</span></div>

  <p class="para rdfs-comment">
   获取由 <code class="parameter">filename</code> 指定的文件的统计信息。如果
   <code class="parameter">filename</code>
   是符号连接，则统计信息是关于被连接文件本身的，而不是符号连接。
  </p>
  <p class="para">
   <span class="function"><a href="lstat.html" class="function">lstat()</a></span>
   和 <span class="function"><strong>stat()</strong></span> 相同，只除了它会返回符号连接的状态。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.stat-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">filename</code></dt>

     <dd>

      <p class="para">
       文件的路径。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.stat-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   <table class="doctable table">
    <caption><strong><span class="function"><strong>stat()</strong></span> 和 <span class="function"><a href="fstat.html" class="function">fstat()</a></span> 返回格式</strong></caption>
    
     <thead>
      <tr>
       <th>数字下标</th>
       <th>关联键名（自 PHP 4.0.6）</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>0</td>
       <td>dev</td>
       <td>device number - 设备名</td>
      </tr>

      <tr>
       <td>1</td>
       <td>ino</td>
       <td>inode number - inode 号码</td>
      </tr>

      <tr>
       <td>2</td>
       <td>mode</td>
       <td>inode protection mode - inode 保护模式</td>
      </tr>

      <tr>
       <td>3</td>
       <td>nlink</td>
       <td>number of links - 被连接数目</td>
      </tr>

      <tr>
       <td>4</td>
       <td>uid</td>
       <td>userid of owner - 所有者的用户 id</td>
      </tr>

      <tr>
       <td>5</td>
       <td>gid</td>
       <td>groupid of owner- 所有者的组 id</td>
      </tr>

      <tr>
       <td>6</td>
       <td>rdev</td>
       <td>device type, if inode device * - 设备类型，如果是 inode 设备的话</td>
      </tr>

      <tr>
       <td>7</td>
       <td>size</td>
       <td>size in bytes - 文件大小的字节数</td>
      </tr>

      <tr>
       <td>8</td>
       <td>atime</td>
       <td>time of last access (unix timestamp) - 上次访问时间（Unix 时间戳）</td>
      </tr>

      <tr>
       <td>9</td>
       <td>mtime</td>
       <td>time of last modification (unix timestamp) - 上次修改时间（Unix 时间戳）</td>
      </tr>

      <tr>
       <td>10</td>
       <td>ctime</td>
       <td>time of last change (unix timestamp) - 上次改变时间（Unix 时间戳）</td>
      </tr>

      <tr>
       <td>11</td>
       <td>blksize</td>
       <td>blocksize of filesystem IO * - 文件系统 IO 的块大小</td>
      </tr>

      <tr>
       <td>12</td>
       <td>blocks</td>
       <td>number of blocks allocated - 所占据块的数目</td>
      </tr>

     </tbody>
    
   </table>

   * Windows 下总是 0。
  </p>
  <p class="para">
      * - 仅在支持 st_blksize 类型的系统下有效。其它系统（如 Windows）返回 -1。
  </p>
  <p class="para">
   如果出错，<span class="function"><strong>stat()</strong></span> 返回 <strong><code>FALSE</code></strong>。
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">
因为 PHP 的整数类型是有符号整型而且很多平台使用 32 位整型，对 2GB
以上的文件，一些文件系统函数可能返回无法预期的结果 。</span></p></blockquote>
 </div>


 <div class="refsect1 errors" id="refsect1-function.stat-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">
   错误时会产生 <strong><code>E_WARNING</code></strong> 级别的错误。
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.stat-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>4.0.6</td>
       <td>
        返回一个数组包含有文件的统计信息，该数组具有以下列出的单元，数组下标从零开始。除了数字索引之外自还可以通过关联索引来访问。
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.stat-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2844">
    <p><strong>Example #1 <span class="function"><strong>stat()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">/*&nbsp;Get&nbsp;file&nbsp;stat&nbsp;*/<br /></span><span style="color: #0000BB">$stat&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">stat</span><span style="color: #007700">(</span><span style="color: #DD0000">'C:\php\php.exe'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*<br />&nbsp;*&nbsp;Print&nbsp;file&nbsp;access&nbsp;time,&nbsp;this&nbsp;is&nbsp;the&nbsp;same&nbsp;<br />&nbsp;*&nbsp;as&nbsp;calling&nbsp;fileatime()<br />&nbsp;*/<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #DD0000">'Access&nbsp;time:&nbsp;'&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'atime'</span><span style="color: #007700">];<br /><br /></span><span style="color: #FF8000">/*<br />&nbsp;*&nbsp;Print&nbsp;file&nbsp;modification&nbsp;time,&nbsp;this&nbsp;is&nbsp;the&nbsp;<br />&nbsp;*&nbsp;same&nbsp;as&nbsp;calling&nbsp;filemtime()<br />&nbsp;*/<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #DD0000">'Modification&nbsp;time:&nbsp;'&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'mtime'</span><span style="color: #007700">];<br /><br /></span><span style="color: #FF8000">/*&nbsp;Print&nbsp;the&nbsp;device&nbsp;number&nbsp;*/<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #DD0000">'Device&nbsp;number:&nbsp;'&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'dev'</span><span style="color: #007700">];<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
  <p class="para">
   <div class="example" id="example-2845">
    <p><strong>Example #2 Using <span class="function"><strong>stat()</strong></span> information together with <span class="function"><a href="touch.html" class="function">touch()</a></span></strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">/*&nbsp;Get&nbsp;file&nbsp;stat&nbsp;*/<br /></span><span style="color: #0000BB">$stat&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">stat</span><span style="color: #007700">(</span><span style="color: #DD0000">'C:\php\php.exe'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;Did&nbsp;we&nbsp;failed&nbsp;to&nbsp;get&nbsp;stat&nbsp;information?&nbsp;*/<br /></span><span style="color: #007700">if&nbsp;(!</span><span style="color: #0000BB">$stat</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">'stat()&nbsp;call&nbsp;failed...'</span><span style="color: #007700">;<br />}&nbsp;else&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;We&nbsp;want&nbsp;the&nbsp;access&nbsp;time&nbsp;to&nbsp;be&nbsp;1&nbsp;week&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;after&nbsp;the&nbsp;current&nbsp;access&nbsp;time.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$atime&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'atime'</span><span style="color: #007700">]&nbsp;+&nbsp;</span><span style="color: #0000BB">604800</span><span style="color: #007700">;<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*&nbsp;Touch&nbsp;the&nbsp;file&nbsp;*/<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #007700">if&nbsp;(!</span><span style="color: #0000BB">touch</span><span style="color: #007700">(</span><span style="color: #DD0000">'some_file.txt'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">time</span><span style="color: #007700">(),&nbsp;</span><span style="color: #0000BB">$atime</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">'Failed&nbsp;to&nbsp;touch&nbsp;file...'</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;else&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">'touch()&nbsp;returned&nbsp;success...'</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.stat-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para">注意：不同文件系统对时间的判断方法可能是不相同的。</p></p></blockquote>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数的结果会被缓存。参见
<span class="function"><a href="clearstatcache.html" class="function">clearstatcache()</a></span> 以获得更多细节。</span></p></blockquote>
  <div class="tip"><strong class="tip">Tip</strong><p class="simpara">自 PHP 5.0.0 起, 此函数也用于<em class="emphasis">某些</em>
URL 包装器。请参见 <a href="wrappers.html" class="xref">支持的协议和封装协议</a>以获得支持 <span class="function"><strong>stat()</strong></span> 系列函数功能的包装器列表。</p></div>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.stat-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="lstat.html" class="function" rel="rdfs-seeAlso">lstat()</a> - 给出一个文件或符号连接的信息</span></li>
    <li class="member"><span class="function"><a href="fstat.html" class="function" rel="rdfs-seeAlso">fstat()</a> - 通过已打开的文件指针取得文件信息</span></li>
    <li class="member"><span class="function"><a href="filemtime.html" class="function" rel="rdfs-seeAlso">filemtime()</a> - 取得文件修改时间</span></li>
    <li class="member"><span class="function"><a href="filegroup.html" class="function" rel="rdfs-seeAlso">filegroup()</a> - 取得文件的组</span></li>
   </ul>
  </p>
 </div>

</div></div></div></body></html>